Simplify each expression and find its value when y = 15.(a) 5y - 21 - 2y = (b) 24 + 12y - 9y =
Question
Solution 1
(a) To simplify the expression 5y - 21 - 2y, you first combine like terms.
5y - 2y = 3y
So, the expression simplifies to 3y - 21.
Now, to find its value when y = 15, you substitute 15 for y in the simplified expression:
3(15) - 21 = 45 - 21 = 24
So, 5y - 21 - 2y = 24 when y = 15.
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